Cons: Un-sharp, kit lens sharper.
Stopped down sharpness is a little better, but not better than the kit lens.
Back focusing at F/4, rest was okay.
Screw drive AF for Pentax noisey.
Plenty of vignetting.

Pros: Goes wider than a kit lens.
Cheapest wide angle lens.

Summary: Horrible lens, extremely disappointed. Got rid of it and paid double the price for the Pentax DA 12-24 - huge leap in quality and so much more happier.

Summary: Disappointed with this lens, on a 40D and even more with a 7D showing off it's optical deficiencies.
Two trips to Japan(!) to remedy de-centering and then a lens element flaw improved things, but not to the levels many reviews suggest.
If you like your kit lenses you will be content enough with a 10-20, if you are used to better glass you may be dissapointed, especially on higher MP bodies.

Pros: Decent build quality, good quality at center of frame on large apertures, good quality at edges from f/8 and smaller, generally good contrast and colors, fast and reliable autofocus

Summary: This is probably one of the best ultrawides for dx (with the noteable exception of the tokina 11-16 which unfortunately doesn't have an autofocus motor).
Good image quality for most purposes, especially outdoors when you've got enough light to use a smaller aperture.

Cons: Mine is a little decentered but nevertheless it doesn't have great corner sharpness, but reaches acceptable levels at f/8 and good at f/11. This is the only minus point in this lens.

Pros: Good center sharpness from f/5.6 and up, great color rendition and flare resistance, good contrast and perfect exposure all the time. Excellent build quality, very silent fast focusing. Very well controlled distortion for a wide-angle lens!

Summary: It's a pleasure to use this lens, the build quality is fantastic, and I'm always sure that the exposures are spot on and with great color rendition. I use the lens hood all the time to prevent flare and to provide a way to protect the front element.

Cons: Considerable geometric distortion in some circumstances but this is mostly due to the sort of lens it is.

Pros: Excellent build quality. Everything has always operated well
Unique finish stands up to frequent use surprisingly well
Well and truly sharp enough for my purpose
Wonderful depth of field
Dramatic images
No focusing issues, ever.

Summary: All lenses work least well wide open. This is no exception. Most lenses are sharper toward the centre. That is mostly true of THIS lens as well. I have shot the interior of hundreds of houses with this lens and am perfeclty happy with the results. It stands up well to frequent use and provides me with spectacular images. I don't shoot test charts and optical compromises have never been an issue for me.

Cons: Sometimes there's a problem with focusing, and it keeps on trying for several seconds. Some photos are not very sharp towards the edges.

Pros: Fantastic dramatic landscapes. Good colors. Makes it very easy to find a good composition.

Summary: Whether it's for in the city, or outdoors for landscapes, this lens hardly leaves my camera. I had to choose between spending money on a wide-angle or a tele-zoom, and I made definitely the right choice!

Pros: nearly without cromatica aberrations, very sharp, very wide, only little cornerdistorsion

Summary: I got the older Pentaxversion without the internal scale-window. And this version is the REAL one, very sharp, beautiful coulors. The new version is NOT so sharp, I had as well a 4/3version and I know, what Iam talking about - I sold it....

Cons: Some field curvature at the edges
Other website/listservs cite uneven manufacturer quality control,
especially decentering
Lens hood does not engage easily (minor)

Pros: Great landscape lens
Color transmission, without filters, is brilliant

Summary: A great lens for all super WA zoom purposes purchased at what
was a great price.
Original equipment prices for comparable Canon/Nikon items are
twice as much and probably afford only slightly better image
quality, if even that.

Cons: This is EX lens, and I expect excellent quality. After a 6 months of usage, zoom ring started rotating too easily. I prefer its initial resistance. This is why only 4 for build quality was given. I feel it steels some parts of blue-green spectrum, but I have to wait for transmission tests on lenstip.com to confirm.

Pros: True wide angle for DX/APS-C users. Very good distortion performace (for such a crazy angles).

Summary: It nedds to be stopped down to f/8-11 to get really sharp images. But it offers usefull quality for all apertures. Another must-have lens for DX/APS-C user. Best used outdoor. A piece of my weekend packing routine: D300 +N1.8D +N70-300VR + S10-20 :-)

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Wydawcą LensTip.com jest firma CO-NET Robert Olech. Adres wydawcy oraz redakcji: ul. Żwirki i Wigury 11/34 83-000 Pruszcz Gdański

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